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Influence of suspended kelp culture on seabed sediment composition in Heini Bay, China
Liu, Yanxia1,2; Huang, Haijun1; Yan, Liwen1; Liu, Xiao3; Zhang, Zehua1
2016-11-05
Source PublicationESTUARINE COASTAL AND SHELF SCIENCE
Volume181Pages:39-50
SubtypeArticle
AbstractKelp aquaculture activities occupy large nearshore areas with significant effects on sediment properties, primarily caused by the influence of the suspended kelp on local hydrodynamics. Changes in sediment composition and grain-size distributions were investigated prior to and following the commencement of kelp aquaculture activities in Heini Bay in eastern China. Seabed sediment types and the particulate matter in suspension during the kelp seeding and harvesting periods, and in sediment cores, were analyzed. While suspended sediment in the kelp aquaculture area was up to 20% organic material, sediment organic content on the seabed remained at similar levels as areas lacking aquaculture. The composition of the seabed sediment in the kelp aquaculture area became finer-grained by the capture of fine particles. Within the kelp aquaculture area, the sediments are poorly sorted and positively skewed, whereas at the shoreward and seaward of the aquaculture area the sediments are relatively coarse grained, well-sorted and nearly symmetrically distributed. Therefore, the kelp aquaculture activities not only increase the fine particulate fraction in the sediments within the aquaculture area, but also result in similar deposits seaward of it, indicating that seabed erosion and accretion is also controlled by the sediment source and the hydrodynamic conditions. The analysis of sediment cores showed that kelp culturing refines the sediment by preferentially capturing particles in the 38-40 mu m size class, while having no effect on the <32 mu m fractions, as evidenced by the positive skew of the surficial sediments. The captured particle size class became well mixed into the sediment, thereby changing the composition of the sediment in the uppermost layer of the core, indicating the existence of continuous and stable hydrodynamic conditions within the kelp aquaculture area. The same effect was observed in the seabed sediments seaward of the aquaculture area. (C) 2016 Elsevier Ltd. All rights reserved.
KeywordKelp Aquaculture Sensitive Grain-size Surficial Sediment Grain Size Parameter Heini Bay
DOI10.1016/j.ecss.2016.07.017
Indexed BySCI
Language英语
WOS IDWOS:000386406500004
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/136176
Collection海洋地质与环境重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
3.Shandong Univ Technol, Zibo 255049, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu, Yanxia,Huang, Haijun,Yan, Liwen,et al. Influence of suspended kelp culture on seabed sediment composition in Heini Bay, China[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2016,181:39-50.
APA Liu, Yanxia,Huang, Haijun,Yan, Liwen,Liu, Xiao,&Zhang, Zehua.(2016).Influence of suspended kelp culture on seabed sediment composition in Heini Bay, China.ESTUARINE COASTAL AND SHELF SCIENCE,181,39-50.
MLA Liu, Yanxia,et al."Influence of suspended kelp culture on seabed sediment composition in Heini Bay, China".ESTUARINE COASTAL AND SHELF SCIENCE 181(2016):39-50.
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